\begin{tikzpicture}[scale=1]
\coordinate (O) at (0,0);

\draw[dashed] (0,2) -- (0,-2);
\draw[gray, ->] (-3.5,0) -- (4,0) node[right] {$y$};
\draw[gray, ->] (-3.2,-2.5) -- (-3.2,2.5) node[right] {$z$};

\path (0,0)++(110:1.3cm)node{$\theta$};
\draw (0,1) arc (90:135:1cm);
\draw[<-] (O)--(135:3cm) node[above left]{$\ve k$};
\path (0,0)++(67:1.8cm)node{$\theta_r$};
\draw (0,1.5) arc(90:45:1.5cm);
\draw[->] (O)--(45:3cm) node[above right]{$\ve k^{(r)}$};
\path (0,0)++(285:1.4cm)node{$\theta_t$};
\draw (0,-1) arc (270:300:1cm);
\draw[->] (O)--(-60:3cm) node[below right]{$\ve k^{(t)}$};




\end{tikzpicture}
